Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb7df0f9039bb4d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-06 13:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8edc3b5095b9491da40cc51eb9395d8a SHA-1: 4f2bf0e559e99fe9f1653a7fbabdf630bf306db5 SHA-256: acb7df0f9039bb4d0f89963431e4d522581b7f3e245af1a40a621c2abae04699
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external sites. One critical heuristic identified a link to a known malicious redirector, which is likely intended to lead the user to a malicious payload. The document body text and embedded URLs suggest a lure related to downloading a book, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=ajay+kumar+singh+english+book+pdf+download In PDF document text
    • http://files.iamroyalheir.com/uploads/1/3/1/4/131407406/vadirabot_runijuduke_tibazeboba.pdfIn PDF document text
    • http://files.youngignorantes.com/uploads/1/3/0/7/130739525/8300585.pdfIn PDF document text
    • http://pipibudin.texaswhiskeytrailstore.com/uploads/1/3/0/8/130874493/cb09320ee95b.pdfIn PDF document text
    • http://files.alpost512carmel.org/uploads/1/3/0/7/130740128/27d96153bec8.pdfIn PDF document text
    • http://maguw.premiumoilcorporation.com/uploads/1/3/0/8/130813747/dadade-lamilu-xunap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/gta_sa_hot_coffe_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/60084614005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/53229348103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/vuvopegegizatamodeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/nukilabamameselunug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/19626340388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/8727958791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/257038693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/sumupezugizijagefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/66731755170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/funifakigem.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: thisdesperatecity.com 5 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5558 5916 bytes
SHA-256: b108a7236a4d0d7e294167c308b5d828902522994ac426ce05ac85746b686f11
font_01_sfnt_off0000696d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 10436 bytes
SHA-256: f0e109c75bc186057a66925bd0c004ab1ccd86a969f0e63a1337c11b0ad84dd6
font_02_sfnt_off00008cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE 7780 bytes
SHA-256: 45386b942bb17968b37742f249a8f9c511edec43314d3ea6e85938a736788646

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